The daily anti-ageing boost for skin comes in the form of a silky liquid texture – the Protein Booster Skin Serum. This advanced formula is absorbed easily by skin, an indication of the immediacy of the delivery of the efficacious ingredients. For best results, use as a companion to any of our moisturizers (Line Smoother or Double-Duty) or Post Shave Cooling Gel. Except for those with oily skin, serums are not intended to provide adequate hydration when used on its own.